Research on the Nonlinear Performance of the Pier under Horizontal Force

2014 ◽  
Vol 1030-1032 ◽  
pp. 1029-1032
Author(s):  
Wan Li Yang ◽  
Yu Cheng Fan ◽  
Jin Yan
Keyword(s):  
Significant Influence ◽  
Mechanical Performance ◽  
Failure Process ◽  
Material Nonlinearity ◽  
Horizontal Force ◽  
Construction Process ◽  
Construction Stage ◽  
Long Span ◽  
Element Program ◽  
Nonlinear Performance

Usually, a large horizontal force will be generated to the pier in the construction process, which may induce significant influence on the pier‘s safety, especially in the case of the bridges with high piers and long span. Some cracks ermerged in the foot part of a pier in the construction stage and a horizontal force was believed to have been load on it, hence its reliability was douted.The pier was simulated with virtual laminated element program, and its mechanical performance under a horizontal force was calculated with both geometrical and material nonlinearity are considerd, thus its whole loading and failure process was illustrated and the pier’s safety was assessed.

The Pier’s Deformation and Load Capacity Calculation of Bridges in Construction with Movable Die Carrier

2014 ◽  
Vol 587-589 ◽  
pp. 1507-1511
Author(s):  
Wan Li Yang ◽  
Xiao Hui Ju ◽  
Li Bian
Keyword(s):  
Mechanical Performance ◽  
Load Capacity ◽  
Material Nonlinearity ◽  
Horizontal Force ◽  
Compression Zone ◽  
Construction Stage ◽  
Bottom Part ◽  
Element Program ◽  
Capacity Calculation ◽  
High Pier

A large horizontal force will be generated to the pier when the movable die carrier walks to the next span, especially for the high-pier bridges. thus a horizontal deflection will be produced as well as cracks developed. With solid degenerated virtual laminated element program, considering both geometrical and material nonlinearity, the mechanical performance of the pier under a horizontal force on the top of the pier is simulated and illustrated, and the cracks emerged at the bottom part of a high pier in the process of the movable die carrier walking to the next span is analyzed. The results show that when the cracks emerged, the stress of the bars and the stress of the concrete in the compression zone is quite small, hence the safety of the bridges in the construction stage is confirmed.

Construction Stage Mechanical Performance Analysis of Long-Span Continuous Rigid Frame Bridge

2014 ◽  
Vol 1030-1032 ◽  
pp. 750-753
Author(s):  
Hua Su
Keyword(s):  
Finite Elements ◽  
Mechanical Performance ◽  
Internal Force ◽  
Construction Process ◽  
Construction Stage ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Rigid Frame Bridge ◽  
Finite Elements Model

Accurate simulation of construction process of continuous rigid frame bridge is a foundation to make a bridge built accurately. Based on the suit iteration method, this paper used MIDAS to built a 3D finite elements model, the internal force and deformation results of each construction stage was obtained. This study provided a good theoretical reference for the control of long-span continuous rigid frame bridge construction..

Construction Monitoring Technology Research on Large-Span V Structure Tied Arch Bridge

2013 ◽  
Vol 351-352 ◽  
pp. 1240-1243 ◽  
Author(s):  
Ting Yin ◽  
Wei Zhang ◽  
Yan Bo Zhao ◽  
Xiao Long Sun
Keyword(s):  
Actual State ◽  
Construction Process ◽  
Bridge Construction ◽  
Monitoring Point ◽  
Monitoring Technology ◽  
Construction Monitoring ◽  
Arch Bridge ◽  
Large Span ◽  
Long Span ◽  
Tied Arch Bridge

Large-span V structure tied arch bridge structure system is complex. In order to make the actual state of the bridge into the ideal state of maximum close to the design, we must make real-time monitoring in the key parts of the structure, and adjust to the design of the data by analysis calculated, to ensure the safety and reliability of arch bridge in the course of construction and into stress after the completed bridge. Combined with the construction monitoring of the main Xinglong Bridge on Si River, this paper introduces the main bridge construction process measurement a preliminary study on the large span V configuration basket tied arch bridge construction monitoring technology. Based on the construction monitoring of Xinglong Bridge on Si River, this paper introduces the main contents and methods of monitoring point location, monitoring control of construction process, and discussed the construction monitoring technology of long-span X-style tied arch bridge V structure.

scholarly journals Determining the quantity of access tubes for quality control of bored pile concrete based on probability approach

2020 ◽  
Vol 14 (2) ◽  
pp. 76-86
Author(s):  
Bach Duong
Keyword(s):  
Quality Control ◽  
National Standard ◽  
Construction Process ◽  
Construction Stage ◽  
Probability Approach ◽  
Bored Pile ◽  
Defects Inspection ◽  
Concrete Quality ◽  
Bored Piles ◽  
Sonic Logging

Unexpected defects of concrete in a completed bored pile can arise during the construction stage. Therefore, post-construction testing of bored pile concrete is an important part of the design and construction process. The Cross-hole Sonic Logging (CSL) method has been the most widely used to examine the concrete quality. This method requires some access tubes pre-installed inside bored piles prior to concreting; the required quantity of access tubes has been pointed out in few literatures and also ruled in the national standard of Vietnam (TCVN 9395:2012). However, theoretical bases aiming to decide the required quantity of access tubes have not been given yet. A probability approach is proposed in this paper aiming to determine the essential quantity of access tubes, which depend not only on pile diameters, magnitude of defects, but also on the technical characteristics of CSL equipment. Keywords: access tubes; bored piles; CSL method; defects; inspection probability.

Causes and Control Measures of Mass Concrete Crack of High-Rise Building Basement Foundation Slab

2010 ◽  
Vol 163-167 ◽  
pp. 1609-1613 ◽  
Author(s):  
Hui Hong Feng ◽  
Xi Wang
Keyword(s):  
Control Measures ◽  
Mass Concrete ◽  
Construction Process ◽  
Construction Stage ◽  
Foundation Slab ◽  
High Rise ◽  
High Rise Building ◽  
Concrete Crack ◽  
And Control

This paper discusses that the causes and the corresponding control measures of mass concrete crack in the construction stage. And through the analysis of engineering example, it describes the application of the control measures of mass concrete crack in the basement foundation slab of high-rise building in construction process, and analyses the construction effect of its.

Practical Calculation of Cable-Stayed Arch Bridge Lateral Stability

2014 ◽  
Vol 587-589 ◽  
pp. 1586-1592 ◽  
Author(s):  
Wei Lu ◽  
Ding Zhou ◽  
Zhi Chen
Keyword(s):  
Calculation Method ◽  
Practical Calculation ◽  
Lateral Stability ◽  
Bridge Structure ◽  
Construction Process ◽  
Energy Principle ◽  
Arch Bridge ◽  
Long Span ◽  
Arch Bridges ◽  
Cable Stayed Bridges

A long-span cable-stayed arch bridge is a new form of bridge structure that combines features of cable-stayed bridges with characteristics of arch bridges. In the present study, we derived a practical calculation method for the lateral destabilization critical loading of cable-stayed arch bridges during the construction process based the energy principle. The validity of the method was verified with an example. The calculation method provides a quick and efficient way to evaluate the lateral stability of a cable-stayed arch bridge and a concrete filled steel tubular arch bridge during the construction process.

Acoustic Emission Characteristics of Rock Failure under Uniaxial Loading

2011 ◽  
Vol 378-379 ◽  
pp. 43-46 ◽  
Author(s):  
Tao Xie ◽  
Qing Hui Jiang ◽  
Rui Chen ◽  
Wei Zhang
Keyword(s):  
Acoustic Emission ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Progressive Failure ◽  
Failure Process ◽  
Testing Machine ◽  
Rock Failure ◽  
Rock Failure Process ◽  
State Variation ◽  
Acoustic Emission Test

With RMT-150C rock testing machine and AEWIN E1.86 DISP acoustic emission system applied, the acoustic emission test was accomplished with two kinds of rock samples including marble and granite under uniaxial compression. Cyclic loading and continuous loading were used through the experiment, and the mechanical performance and acoustic emission (AE) characteristics were obtained during the process of rock progressive failure. Details related to the relationship between amount of AE and stress-strain was given in this paper. A comparison between marble and granite was made as well following the general AE law, on the basis of which, the failure mechanism of rock mass was investigated. Finally, some conclusions can be summarized as follows:(1) AE activity features are different with stress state variation in rock failure process;(2) loading patterns make a direct impact on the failure process thereby affecting AE activities;(3)AE activities are various basing on the different types of rocks, structures and failure modes.

A Seismic Isolated Long-Span Overhanging Urban Infrastructure

2009 ◽  
Vol 4 (3) ◽  
pp. 192-198 ◽  
Author(s):  
Yutaka Nakamura ◽  
◽  
Toshiaki Saito ◽  
Kazuo Tamura
Keyword(s):  
Large Scale ◽  
Soft Soil ◽  
Urban Infrastructure ◽  
Ground Level ◽  
Construction Process ◽  
Structural System ◽  
Cage Structure ◽  
Long Span ◽  
Story Building ◽  
Base Isolators

The design and construction of a long-span, seismic isolated office building located in Tokyo and completed in October 2003, meets the needs of a sustainable urban environment. The 6-story building is 20 m × 80 m and uses a large-scale “trussed cage” structure, the upper part of which is supported on six base isolators on independent columns, creating an expansive area at ground level. The building’s seismic design uses artificial earthquake input movement taking into account the soft soil of the site and the frequency of Japan’s earthquakes. We detail the structural system and design concept, construction process, and health monitoring in the section that follow.

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